Light-controlling device



W. J. HARVEY.

LIGHT CONTROLLING DEVICE.

APPLICATION FILED DEC-131| 1917.

` ramempr. 6,1920.

2 SHEETS-SHEET l.

Inventprz W. '.l. HARVEY.

LIIGHI CONTOLLING DEVICE. `APPLICATION FILED DEcLs, 19u.

1,335,333.- l Patented Apr. 6,1920.

2 SHEETS-SHEET 2.

@En s'rAirEs PATENT. orrion.

WALTER. JAMES HARVEY, oF'roRoN'ro, ONTARIO, CANADA.

To all whom. it may concern Be it known that I, WALTER JAMES HARVEY, a subject. of4 the King of Great rconsists the novel construction and air-'- rangement of parts, whereby a plurality of Britain, and resident of the city of Toronto, county of York, Province of Ontario, inthe Dominion of Canada, have invented certain l The principal objects of this invention lare to devise an apparatus by means of -which rays of light from a plurality of individual light sources may be'.y concentrated and effectively controlled particularly in the application of light for therapeutic and ophthalmic work, and further` to devise an apparatus which may be lvery easily manipulated and adjusted. f V v The principal feature@ of the invention individual light concentrating units, each having a separate source of light maybe operated in unison to concentrate their rays at dii'erent foci, and whereby the relative arran ement between the light, the reflector,

and light control screens or lenses n'iaybe varied uniformlysin the operation of. the device? y In the accompanying drawings, Figure-1 is a front 'elevational view of a device constructed .in accordance'with this invent-ion.

Fig. 2 is a longitudinalmid sectionalview through the device.

Fig. 3 is an enlarged perspective detail'- partly in section Orione of the individual 'units and the operating mechanism'therefor,

In my previous application .for patent for' a device for the concentration olight rays led under Serial Number 204,06Qand dated Nov. 26th, 1917, 'I have shown an arrangef ment of, a pluralityof individual reflector members .so connected and operated fas to elfect the concentration of the rays of light from a conimon'light sdnrce upon varying foci' and -in the present invention I utilize" the same general structure of inain frame, the ring 1 being rigidly base 2 and a' plurality of radial arms 3 being rigidly supported betweensaid ring and the circle shaped central member-:4a Eachof the arms-3 are formed with longitudinal'slots 5 and 6 toward their outer ends.

Specification of Letters Patent.

supported upon'the PatentedApr. 6, 1920.

'Application led December 31, 1917. lSerial No. 209,786.

7 are bars pivotally secured upon the bolts 8 secured in theradial arms 3between the -slots 5 and 6. The inner ends of the bars 7 are connected by the vbars 9 to the free end of the swinging links 10 which are pivotally connected by fixed pivots to the radial'aims 3 adj acent to the center.

A threaded spindle 11 is rotatably mounted in the central member-4 and a nut 12 threaded on said spindle-is connected tothe inner ends of the bar 9 by the links 13 so that upon the rotation of the spindle by means of the crank 14 the nut will travel forwardly orbackwardly and operatethe 'bars 9 to swing the bars 7 on their pivots.

U-shaped' frames 15 are rigidly secured to `the outerends of the bars 7 and upon .the

ends of these frames are carried any deshown in the form of an electric arc. Y .AM-shaped frame 16 of slightly smaller dimensions than' the frame 15. is arranged ,within each of the frames 15 having at their outer end's the supporting members 17 whichv are slidably arranged upon the sides of the` frames 15 and which carry the reflectors 18. 'These reflectors are of' any desirable shape bestsuited to the work forwhich the device is adapted to be. used. Bars 19 are secured to the inner sides of the frames 16 and these .are formed with longitudinal slots 20 through which the bolts 8 extend.

sirable form of light source which is here Blocks`21 with' beveled edges are arranged I 4upon the bolts 8 within the slots 20 and suit- 1 able thumb screws are threaded on the bolts so that by the tightening of the thumb screws against the end blocks the bars 19 may be held from longitudinal movement.

f Blocks 22 are arranged in the slots 6 in the outward ends of the arms 3 having their stems andthumb nuts 23. i

l' Links 24 lare pivotally connected to the bars 19 at Athe outward ends of the slots and at the other end are pivotally secured upon the threaded stems. on theblocks 22, -said blocks and thumb nuts being so designed that by tightening the nut the end'of the link may be held securely from movement in relation to the arms 3. J

U-shaped frames 25 corresponding with the frames 15 and 16 are supported on longitudinally's'lotted bars 26 which are slidably mounted on blocks carried on the bolts 8'at the opposite side of thearms 3 from the bars 19 and pivotal links 271similar to the links 24 are connected thereto at the forward end-of the slot and Ato sliding lock blocks 28 4arranged in the slots 6 in the arms 3.

The frames 25 extend beyond the light supporting frames and are adapted to carry the vscreen'and lens holding receptacles 29.

f It will be understood'that' the center of the-lens supporting receptacles and the centen of the reflectors are arranged in alinement with the center of the light.

. In `the operation of the device the rotation of the threaded spindle causes the traveling of the nut l2 upon the spindle and the consequent swinging of the links 10, bars 9 and bars 7 to alter the focusing of the rays of light from'the several reflectors upona delilies. If it is desirable that the focus of the light of each individual reflector be main-- tained constant the thumb -nuts at the ends of the .links- 24C and 27 are loosened so that as the bars 7 'tilt the blocks may slide freely inthe slots 5 and' 6; If, however, it -is desired that the focus of the individual reflectors be altered according to the change in the angle of inclination inthe beam of light the thumb,7 nut of the link 24 is tightened to prevent the sliding of the block in the slot 6 and thethumb nut on the bolt .8 is loosened, consequently as the bar 7 is tilted the slotted bar 19 slides upon the supporting block and the reflector is drawn away from the light. 4 y

If it is desired t0 alter the distance between the. light and the lens or-screens the thumb nut fastening the block inthe slot 5 is tightened and the nut controllingl the bar 26 is loosened so that, the links 27 will cause the Ufframe 25 to change its relation with theother frames as the 'bars' 7 tilt. Either,

or both of, these adjustments may be made according to the requirements, or the device may be operated without either adjustment swing said units in unison on their pivots'to v,

and the relationy of the reflector, light and screens be retained fixed.

What I claimias my invention is nl. A light controlling device, comprising a plurality of' supporting members extending radially from a common center, light concentrating units pivotall mounted on said'supports, and centrally isposed means connected with said light units adapted to adjust the focus of the Ientire battery of units.

a plurality of individual lightunits pivot- 2. A light controlling device, comprising,

means for swinging said light units upony their pivotal supports in unison, andmeans adapted to be adjusted to effect the automatic adjustment between the lights and their `,coperating` units or to maintain the lights and their coperating concentrating units in fixed relation the one to the other.

4. A light controlling device, comprising, a frame', a plurality of bars pivotally supported on said frame and each supporting a lightA at one end, vmeans connected to the other ends of` said bars for swinging same on their pivots, reflector supporting members slidably supported from said light supports, means for locking said sliding reflector supporting members, links pivotally connected to said reflector supporting members and slidably lconnected to the frame, and means for locking saidlink members to the frame.

5. A light controlling device, comprising, a frame, a plurality'hof pivotal members supported on said frame and each supporting lights, reflector supporting members adjustably supported from said light supports,

frames, adjustably supported in relat1on toj securedin said U-shaped extensions, U-shaped frames slidablyconnected lwith the aforesai'd U `frames, reflectors carried inthe latterI frames, U-frames slidably adjustable'independently of the aforesaid frames and carried upon said pivotal members, screen or lens frames secured in the latter U-shaped frames beyond the light sources, means for adjusting said reflectorand screen supporting1 framesin relation to said lights and t0 each other,y and means for swinging said reflector supports vin unison. f

,WALTER JAMES HARVEY.' 

